Home › Previous year questions › GATE 2023 PI › Question 7GATE 2023 PI – Question 7 General Aptitude · Quantitative Aptitude: Data Interpretation, Arithmetic and Number Computation · 2 marks · Multiple choice
To construct a wall, sand and cement are mixed in the ratio of 3:1. The cost of sand and that of cement are in the ratio of 1:2. If the total cost of sand and cement to construct the wall is 1000 rupees, then what is the cost (in rupees) of cement used?
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Show answer and explanation Correct answer: (A) 400
Explanation The quantity ratio is 3:1 and unit-price ratio is 1:2.
Hence expenditure is $3(1):1(2)=3:2$. Cement cost is $(2/5)(1000)=400$ rupees, **A**.
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